1. Department of Psychiatry, VU University Medical Center, Amsterdam, The Netherlands
2. Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
3. Department of Research and Development Evean, Espria, Purmerend, The Netherlands
4. TNO, Child Health, Leiden, The Netherlands
5. Medical Library, VU University Amsterdam, Amsterdam, The Netherlands
6. Department of Clinical Psychology, VU University Amsterdam, Amsterdam, The Netherlands